When you return to mayor Clayton to complete the quest "Feltrite Sample", the Well alarm will sound and this quest will be given to you. It is a very simple quest. Just do as it says and go see Carlson.

It turns out that the situation is turning critical. The Ghost Clan seized the Well and is threatening to poison the Wellspring water supply, and that will strangle the town. Accept the quest "Hijacked Well" and continue with it, and consider visiting the "Outfitters" if you need some supplies.